I put my pair together for a while the other day hoping they'd breed. Apparently the male got some sand, very large grained sand, (which i now know isnt a very good substrate and will most likely replace) stuck to IT. That apparently caused IT to dry out and some of the sand was stuck to it. To make a long story short, it cant retract. I put him in an empty 2 and a half gallon aquarium with enough water to keep it submerged but still keep his head up for a while, and tried to get the sand off. That helped alot and it did retract some, but still isnt quite right. I also noticed a very very tiny ammount of blood around his vent. Id say more than likely there was a small abrasion from the sand, and the scab came of when the sand did, but i dont know for sure. Anyway, i would like to know if there is anything else i should do, or if i should just keep soaking him in water off and on till things get better.